Organic light-emitting device with homogeneous temperature distribution

Abstract

An organic light-emitting device ( 100 ) comprising: an active layer for producing electroluminescent radiation and decoupling the electroluminescent radiation; and a thermally -conducting layer ( 206 ) located in a decoupling path of the electroluminescent radiation for dissipating heat generated during an electroluminescence process; wherein the thermally -conducting layer ( 206 ) has a thermal conductivity of more than 200 W/mK, in particular more than 500 W/mK.

The invention claimed is: 
     
       1. An organic light-emitting device comprising:
 an active layer for producing electroluminescent radiation and decoupling the electroluminescent radiation; and 
 a thermally-conducting layer located in a decoupling path of the electroluminescent radiation for dissipating heat generated during an electroluminescence process, the thermally-conducting layer comprising a multiplicity of separate partial regions, and the thermally-conducting layer comprising carbon nano tubes as thermally-conducting material; 
 wherein the thermally-conducting layer has a thermal conductivity of more than 200W/mK. 
 
     
     
       2. The organic light-emitting device of  claim 1 , wherein the thermally-conducting layer is in direct contact with the active layer. 
     
     
       3. The organic light-emitting device of  claim 1 , wherein the thermally-conducting layer is located in a radiation-decoupling path of the electroluminescent radiation. 
     
     
       4. The organic light-emitting device of  claim 1 , further comprising an anode layer, wherein the thermally-conducting layer is an intermediate layer in the anode layer. 
     
     
       5. The organic light-emitting device of  claim 1 , further comprising an anode layer, wherein the thermally-conducting layer comprises a multiplicity of intermediate layers in the anode layer. 
     
     
       6. The organic light-emitting device of  claim 1 , further comprising an organic functional layer comprising the active layer, wherein the thermally-conducting layer comprises an intermediate layer in the organic functional layer. 
     
     
       7. The organic light-emitting device of  claim 6 , wherein the thermally-conducting layer comprises a multiplicity of intermediate layers in the organic functional layer. 
     
     
       8. The organic light-emitting device of  claim 1 , further comprising a cathode layer, wherein the thermally-conducting layer covers the cathode layer. 
     
     
       9. The organic light-emitting device of  claim 1 , further comprising an anode layer and an organic functional layer, wherein the thermally-conducting layer is located between the anode layer and the organic functional layer. 
     
     
       10. The organic light-emitting device of  claim 9 , wherein the thermally-conducting layer extends in the form of separate strips on a boundary area between the anode layer and the organic functional layer. 
     
     
       11. The organic light-emitting device of  claim 9 , wherein the thermally-conducting layer extends like a network on the boundary area between the anode layer and the organic functional layer. 
     
     
       12. The organic light-emitting device of  claim 1 , wherein the thermally-conducting layer comprises a graphite foil as thermally-conducting material. 
     
     
       13. The organic light-emitting device of  claim 1 , wherein the thermally-conducting layer has a thermal conductivity of more than 500 W/mK.